YueYueZou&reg; 3.5" CPU Fan Speed Controller for PC Computer 4 Channel Voltage of Fan 1, Fan 2, Fan 3, Fan 4 is 6V to 12V Stylish housing with Ultra-Bright LED light Size: 3.86" x 3.66" x 0.75" / 9.8cm x 9.3cm x 1.9cm; Color of LED: Blue Package Contents: 1 x 3.5" Bay Panel Fan Speed Controller